Refractory furnace



Patented Dec. 28, 1920.

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REFRACTORY FURNACE.

APPLICATION FILED MAR. 5, I920.

w. J. HILL. REFRACTORY FURNACE.

,APPLICATION FILED MAR. 5. I920.

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Patent Dec. 28

INVE OH/ 6.5mm BY 6. wefiemfim k ATTORNEY UNITED STATES PATENT OFFICE.

REFRACTORY FURNACE.

Application filed March 5,

To all whom it may concern:

Be it known that I, YVILLIAM .lnrrnnv HILL, a subject of the King of Great Britain,

and residing at 7 9 Brewster avenue, in the city and district of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented a new and useful Refractory Furnace, of which the following is a specification.

The invention relates to refractory furnaceg as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel construction and arrangement of the refractory element in the furnace structure, which accumulates and radiates the heat, whereby the articles of manufacture are treated without the direct application of combustible fuels.

The objects of the invention are to equalize the heat in treating certain articles of manufacture, such as enameled metal and tempered steel and various things that require an oven in which no-excesses of heat occur during the manufacturing process; to improve the quality of enameled wares; to economize in the consumption of fuel; and generally to provide an efficient and durable furnace for the purposes aforesaid.

In the drawings, Figure 1 is a perspective view of the furnace, showing the door removed and one wall broken away to disclose the interior.

Fig. 2 is an enlarged perspective detail, showing one end of the interior.

Fig. 3 is a front elevation, showing the door removed.

Fig. 4 is a plan view, showing the fines, the interior and the heat accumulating ele ment.

Fig. 5 is a sectional view, showing the arrangement of the flues.

Fig. 6 is an enlarged perspective detail of the heat accumulating element.

Fig. 7 is an enlarged perspective detail, showing a fragmentary view of the central fiue.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, the firebrick element in this invention, which accumulates the heat and eventually radiates it, is made up of the transverse rows 1, spaced apart, and built up alternately with the longitudinal rows 2, also spaced apart. These Specification of Letters Patent.

Patented Dec. 28, 1920.

1920. Serial No. 363,591.

- transverse and longitudinal rows of firebrick are built over a central flue 3, which is on the ground, but the said rows also extend downwardly at each side of the flue 3, and 1n the top of the said flue the inlet openings at, spaced apart, form the means of communication between said flue and the various tortuous passages between the transverse and longitudinal rows.

The outlet openings 5 at the bottom of the flue 8 and through the sides thereof extend in the closed passages 6 beyond the heating element into the side fiues 7, which lead to the end fine 8 and to the chimney. The side fines 7 and in fact the heating element formed of the transverse and longitudinal rows 1 and 2 and central flue are contained within the brick structure 9, which is also over the top to form the arch ceiling in the combustion and oven chamber 11, which is above the heating element, and is formed with the side ledges 12, which act as brick supports in inserting and withdrawing the articles treated. V

The burner opening 13 is at the end of the chamber 11 and intermediate of the distance between the heating element and the ceiling 10, and the burner 14 is inserted in said openin and emits a flame into the chamber 11.

he deflecting lab 15 extends throughout the length of the heating element and lays there on top, but is not quite as wide as the said heating element, consequently certain spaces are left, which form openings 16 to the tortuous passages in the heating element to permit the flow of the heating gases to said passages, and down therethrough to the central flue 3.

The deflecting slab 15 is glazed or otherwise treated to more quickly turn the gases to the openings 16, and upon this slab the central, vertical and longitudinal wall 17 stands on the brick supports 18, the latter being spaced so as to permit free communication across the deflecting slab 15 for the heating gases between said bricks 18.

In the operation of this invention, the burner is attached to a suitable oil supply and operated in the usual way that hydrocarbon burners are used, and a flame is projected into the oven, and as the front of the furnace is closed by a suitable door, the whole chamber 11 is filled with flame.

These hot gases are deflected to the sides and through the openings 16 penetrate into the maze of passages formed by the crossed bricks in rows. The gases, in flowing through the heating element, are of course much obstructed by the bricks of the same, therefore the said bricks get heated to a white heat, for there is a continual drive behind of the gases.

The gases eventually find their way to the inlet openings 4: of the central fine 3, which also becomes extremely hot, and then pass through the outlet openings 5 to the side fiues 7 and on to the end flue and out of the chimney, but in this long and tortuous way through the furnace, practically all the heat has been absorbed by the bricks of the heating element and the surroundings, and as soon as these bricks have become heated to a very high temperature, the burner, or the flame, is put out the articles inserted in the oven chamber being supported on the ledges and central Wall.

These articles are left in the oven for a predetermined period of time, according to the work to be done, and the heat from the bricks radiates and accomplishes the industrial purpose, for which the furnace is used.

Various changes may be made in the details of construction without departing from the spirit of the invention, and so long as such changes are Within the scope of the claims for novelty following, the protection accorded shall not be invalidated.

that I claim is l. A furnace structure comprising a heat accumulating and radiating element having tortuous passages therethrough by the arrangement of fire brick transversely and longitudinally, a deflecting slab surmount- "rior wall level with said vertical central wall, and a hydrocarbon burner emitting a flame into said oven.

2. A furnace structure comprising a heat accumulating and radiating element having transverse rows of fire brick built on long1- tudinal rows of fire brick, a brick inclosure containing said element in the lower portion thereof and a central flue having inlet openings in the top thereof communicating with the open work heat element and side fines communicating with said central fines, a central vertical wall and a deflecting wall partly covering said heat element under said vertical 'wall and separated therefrom by transverse brick supports suitably opened, and a hydrocarbon burner emitting flames above said heat element.

Signed at the city of Montreal, in the Province of Quebec, in the Dominion of Canada, this 28th day of February, 1920.

WILLIAM J EFFER-Y HILL. 

